Going crazy with CFD

I just learned something new today. For most Computational Fluid Dynamics (CFD) problems, the solution (dependent variable) is the flux of the primitive variables (i.e. flux of density, velocity and energy) at any given time and not the primitive variables itself. I guess that is in contrast with what ppl like myself in solid mechanics deal with; which is mainly the primative solution of strain. So are we any inferior, 'cos strain is like only one variable? Hell no! Strain is actually 9 variables arranged in a 3x3 matrix, while density (1), velocity (3) and energy (1) flux only constitute 5 variables! Well ok, there's still pressure, which makes it 6 variables, but only 5 variables need to be solved for in the partial difference equations (PDE), which is the hard part, in CFD. :P

There is however, a striking similarity between the CFD and solid mechanics methods of solution. In CFD the boundary value problem (BVP) can be solved in the conservation form or the non conservation form, with the former being preferred because the solution remains stable over a discontinuous shock wave. In solid mechanics the BVP can be solved using the displacement method or the force method, with the former being preferred because the solution remains stable over discontinuous stress fields (i.e. nonlinear behavior). So I guess we should just kiss and make up and learn from each other after all!

In other news, I watched silent hill and scary movie 4 today. Scary movie is absolutely hilarious! But they have so many spoofs though, and the spoofs even look almost like the original set that there isn't really much of its own story. And besides, its less that an hour and a half long, a tad too short for my $9.50..... Silent Hill was just weird, I still haven't really got it. I guess its supposed to just scare the shit out of you, but I wasn't really scared, more like humoured. It topped the US box office though!